Definitions
Specialized knowledge that is mysterious to the uninitiated.
Word origin
From Latin arcānus (“hidden, secret”), from arcēre (“to withhold”), arca (“a chest”).
Used in a sentence
“This is not, however, a mere salmagundi of alphabetical arcana.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Secret knowledge”6 letters
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